[Gmsh] Meshing the volume between a model and a surrouding cuboid

[Mike B.]

Dear Henk,

Thanks for the reply-it answers part of my question, that is, how to mesh the volume between the outer cuboid and the inner STL model.

However, how do I generate a mesh which is fine around the inner surface (the model) and becoming coarse towards the surrounding cuboid?. I tried using the threshold and attractor fields but it seems the latter does not support surfaces:
http://geuz.org/pipermail/gmsh/2009/004198.html

Is it possible to extract the surface points of the model and use them as attractors?.

Thanks,
MIke.


--- On Thu, 6/18/09, dolfyn <info at dolfyn.net> wrote:

From: dolfyn <info at dolfyn.net>
Subject: Re: [Gmsh] Meshing the volume between a model and a surrouding cuboid
To: gmsh at geuz.org
Date: Thursday, June 18, 2009, 9:43 PM

Dear Mike,

Do you mean something like this?

http://www.dolfyn.net/dolfyn/gmsh/tutorial07.html

Next step with the 'attractor' can be achieved with a background 
mesh (a todo for me).

Enjoy!
Henk

Op Thursday 18 June 2009, schreef Mike B.:
> Dear Gmsh users,
>
> I'm rephrasing a previous question, hopefully to make it clearer
> what I'm after:
>
> I have an object (given as an STL file) and which I load it into
> Gmsh with Merge 'obj.stl'. I then define in Gmsh a control volume
> ( a cuboid ) around the model.
>
> Now, I want to mesh the volume between the cuboid and the model.
> How do I do that?. Also, I'd like to have a finer mesh close to
> the model surface and a coarser one away from it (use the
> `Attractor' field?).
>
> Would appreciate help how to achieve these two.
>
> Thanks,
> Mike.

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